HiFi tube amp and homebrew guitar preamp

Non-Rickenbacker Guitars & Effects

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Re: HiFi tube amp and homebrew guitar preamp

Postby (espidog) » Wed Nov 18, 2020 2:24 am

I see that the Seeburg amp offers a choice between cathode-biased and fixed biasing. Nice touch. 8)
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Re: HiFi tube amp and homebrew guitar preamp

Postby (Dom) » Thu Dec 31, 2020 4:44 pm

Hey Tube_Fan John, do you have any experience running an l-pad between the amp and the speaker to get a saturated sound at lower volumes? Cheap enough to build but for the life of me I can’t find a decent a-b test to see the efficacy. I’m looking at slapping one together for my 24w Supro and one for an Orange AD30.
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Re: HiFi tube amp and homebrew guitar preamp

Postby (Tube_Fan) » Tue Jan 05, 2021 3:08 pm

I never used an Ipad. I have some laptops. I have one connected to a Lepai amp and some speakers via the head phone jack.
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Re: HiFi tube amp and homebrew guitar preamp

Postby (Dom) » Sat Jan 09, 2021 2:43 pm

D’oh! I should have used a capital L. An L pad is a simple attenuator that shunts a certain amount of signal as heat. I’ve never had a chance to use an attenuator on anything myself. And sorry for the thread jack!
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Re: HiFi tube amp and homebrew guitar preamp

Postby (Tube_Fan) » Sun Jan 10, 2021 11:05 am

LPAD. I've used those with midrange speakers and tweeters. I never used them with a guitar amp.
Here's a 100W LPAD.
https://www.parts-express.com/parts-exp ... m--260-262
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Re: HiFi tube amp and homebrew guitar preamp

Postby (jps) » Sun Jan 10, 2021 11:33 am

I have one of those around here somewhere, brand new in the box, someone could have.
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